—Hi, Bob! Can you tell me ______?
—Sure. The No.5 bus will take you there.
A:how far is it
B:where is the zoo
C:how I can get to the zoo
D:which bus should I take
如图所示,四棱锥S﹣ABCD的底面ABCD为等腰梯形,AB∥CD,对角线AC与BD交于点O,OA=3,OD=1,CD=2,SO⊥底面ABCD.
求证:SA⊥BD
读图,图中虚线表示回归线和极圈,关于图中内容的正确叙述是( )